SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Function count (children 1)
     ExpressionList (children 1)
      Asterisk
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier test_array_ops
   Function less (children 1)
    ExpressionList (children 2)
     Identifier arr
     Function CAST (children 1)
      ExpressionList (children 2)
       Literal Array_[UInt64_10, Int64_-20]
       Literal \'Array(Nullable(Int64))\'